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x in (-oo:+oo)
(2*x-1)/5 = -7 // + 7
(2*x-1)/5+7 = 0
(2*x-1)/5+(5*7)/5 = 0
2*x+5*7-1 = 0
2*x+34 = 0
(2*x+34)/5 = 0
(2*x+34)/5 = 0 // * 5
2*x+34 = 0
2*x+34 = 0 // - 34
2*x = -34 // : 2
x = -34/2
x = -17
x = -17
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